Potassium Carbonate → HCID 86679691, compound

Participants

Reaction Steps

To a solution of 3-bromo-5-(chloromethyl)pyridine (XLVI) (1.17 g, 4.8 mmol) in MeCN (0.2 mL) and (2S,6R)-2,6-dimethylpiperidine (2.6 mL, 19.3 mmol) was added K2CO3 (667 mg, 4.8 mmol). The reaction was refluxed for 5 hrs. TLC showed the presence of starting material so additional (2S,6R)-2,6-dimethylpiperidine (2.0 mL, 14.8 mmol) was added and the reaction was refluxed for an additional 5 hrs. The solvent was removed and the residue was partitioned between EtOAc/water. The EtOAc was separated and washed with brine, dried over MgSO4 and concentrated under vacuum. The residue was purified on a silica gel column (100% hexanes→6:94 EtOAc:hexanes) to afford 3-bromo-5-(((2R,6S)-2,6-dimethylpiperidin-1-yl)methyl)pyridine (XLVII) as a clear oil (728 mg, 2.57 mmol, 53% yield). 1H NMR (DMSO-d6) δ ppm 0.92 (d, J=8 Hz, 6H), 1.21-1.32 (m, 3H), 1.52-1.55 (m, 2H), 1.59-1.63 (m, 1H), 2.42-2.46 (m, 2H), 3.73 (s, 2H), 7.97-7.98 (m, 1H), 8.50 (d, J=3 Hz, 1H), 8.55-8.56 (m, 1H); ESIMS found for C13H19BrN2 m/z 283 (M+H).

Provenance & Evidence